Silo.



W. HANSON L A. PALMQUIST.

SILO.

APPLICATION FILED MAR.23,1911. 998,575. Patented July 18, 1911.

WILLIAMHANSON AND`ANTON PALMQUIST, OF IBA-BRON; WISCONSIN.. .Y

Specication'cf Letters Patent.

Application filed March 23, 1911.

To (LLL whom it may concern' Be it known that we, lViLLr-AM Hanson andANTON PALMQUIST, citizens Aof the United States7 residing at Barron, inthe county of Barron and State of lVisconsin, have invented certain newand useful lm- Yprovements in Silos, of which the following is aspecilication, reference being had to the. accompanying drawings...

This invention relates to improvements in roofed cylindrical structuresand particularly to improvements in such structures the cylindrical wallof which is made up of staves; a silo is a common example of such astructure.

An object of this invention is to provide a structure of the characterjust mentioned with a roof which will not interfere with the inward andoutward movement of the staves which make up the cylindrical wall andwhich are commonly held together or bound by hoops.

ln thedrawings illustrating the principle of this invention and thebestmode now known to us of applying that principle. Figure 1 is aperspective view of a silo embodying this invention, the roof beingshown removed; Fig. 2 is a fragmentary elevation showing the rooftimbers in place; Fig. 3 is a section on the line AA, of Fig. 2; Fig. iis a perspective view of the roof timbers assembled; and Fig. 5 showsthe roof boards in place upon the roof timbers of Fig. 4. 1

. The cylindrical wall of the silo a is made up of the staves b whichare bound together by the hoops c. The ends of the latter are formedwith ears (Z which are held together bv bolts e; and by loosening andtightening these bolts the hoops be adjusted toallow for the contractionand expansion of the staves. The cylindrical wall of the silo isprovidedin the usual manner with the doors f. The roof frame f7 consistscfa pair of stringers or principals h which, are bolted together attheir ends and centrally disposed between which is fastened a base block2l set in a mortise in which is the foot? or Patented July 18, 1911.

Serial No. 616,293.

ten'on, of the crown-post j. Fastened to the stringere or principals Lof the roof frame are the inner ends of the purlins 7c, which extendoutwardly in a radial direction. 1 iT he vouter ends lof the purlins /cand the principals la. rest loosely in kerfs or gains c, h formed in theupper end of`the cylindrical wall -of the silo. The lower endsl of the.rafters m'a/re fastened to the outer ends of the purlins 7c, while theupper ends of the rafters m are fastened to the top of the crown-postthe roofboards n in the usual manner. The roof boards n maly be coveredwith shingles o or any felt or composition roofing. No

fastening devices are used to bind the horizontal members of th roofframe to the cy. lindrical wall of the'ilo; but the roof fra-me is heldin place thereon merely by its weight. .ills the hoops are tightened orloosened and the cylindrical wall' is thereby contracted or allowed toexpand, there is a slight rela' tive movement of the outer ends of thehorizontal frame membersof the ro'of in the kerfs or gains t, c.

lt is obvious that the roof hereinbefore described will protect thecontents of the silo from the elements and at the Sametime will notinterfere with thetightening or the loosening of the hoops or bands, asthe stavef formed cylindrical wall contracts or eX- pands.

To claim:

l. A roofed structure of the character de-` scribed having a bodyportion of staves formed at its upper end with notches; and a roof framethe members of which are slidably mounted in said notches and therebypermit the free inward and outward move- 'ment of theupper ends of saidstaves as the body portion contracts and expands.

2. A roofed structure of the character described having al body portionof staves formed at its upper end with notches; roofframe members whichare slidably mounted in said notches and thereby permit the free inwardand outward movement of the upper ends of said st-aVes as the bodyportion conrlo the rafters m are nailed tracts and expands; and meanswhich eon trol the degree of said inward and outward movement of theupper ends of said staves.

3. A roofed silo the stave-formed body of which is formed with notchesin which rest siidahly the hori'Lont-al frame members of the roof; theupper end of the body being free to contract and expand and to moverelatively to said frame members in doing so.

day of March, A. I). 1911, in the presence of the tivo undersignedwitnesses.

WILLIAM HANSON. ANTON PALMQUIST.

1V itnesses z ARTHUR E. Con, Emmi: KENT.

Copies of lthis patent may be obtained for vc cents each, by addressingthe Commissioner of Patents Washington, D. C.l

Signed at Barron, Tisconrsin` this 18th l"

